Examination and diagnosis of renal cysts:
1. laboratory inspection
Urinalysis in its normal majority. Microscopic hematuria is rare. Renal function tests are normal, except for the multiple cysts or bilateral (rare) .Even the side surface of the extensive destruction of kidney, but also by the contralateral kidney compensatory hypertrophy and maintain full normal renal function.
Abdominal radiography often you can see the shadow of the kidney or part of a mass oppression swollen. The cysts can cause kidney weight or position the torsion shaft leading to kidney abnormalities. Sometimes the tumor edge strips can see calcification. Excretory urography can be confirmed. In the intravenous injection of contrast agent after 1-2 minutes, the radiograph showing increased renal vascular density, and part of the space occupied by the cyst does not, because there is no blood vessels. Urography radiograph showed a continuous presence of masses. A cyst or more calyx or pelvis around often due to depression or folded, and become enlarged, flattened lumen even disappear. Oblique and lateral radiographs are useful for diagnosis. When the mass occupied the pole, ureteral kidney will move next to the spine. Rotation will occur kidney itself. For fluid sac or transmission line can be to see the psoas muscle. When conventional urography can not distinguish effectively opaque when the renal parenchyma, X-ray tomography scan can be increased renal vascular contrast renal cysts. Occasionally there are relatively non-renal tumor blood vessels, thus easily confused with cysts. A few cases can also occur tumors of the cyst wall is needed further consideration in the differential diagnosis.
3. CT scan
Identification of renal cysts and tumors, CT is the most accurate. Fluid density similar to water cyst, and the density of tumor and normal renal parenchyma like. After intravenous injection of contrast agent, renal parenchyma becomes denser, and the cyst is not affected; cyst wall and the renal parenchyma have clear boundaries, whereas no tumors; cyst wall is thin, the tumor is not. In many aspects, the identification of cysts and tumors CT judgment is superior puncture liquid.
4. Renal ultrasound
Taking non-invasive diagnostic techniques to identify the substance of renal cysts and masses when a large proportion of ultrasound. When it finds a match cysts ultrasound imaging using ultrasound can puncture the cyst and cyst fluid aspiration.
5. isotopic Exploration
Line shows the profile of mass analysis, but is difficult to distinguish the cysts or tumors. The use of technetium tomography can demonstrate avascular mass. When the inspection of cysts and tumors of identification are still in doubt, it is necessary to drill aspiration.
The diagnosis of renal cysts
1. The first symptoms of the disease, in general, are often found in medical waiting time B, cyst diameter> 10 cm when causing symptoms. The higher abdominal pain lumbar pain increased bleeding cyst infection.
2. Physical examination even have to be in the waist and abdominal cystic mass.
3. B supernormal can confirm the diagnosis when suspected malignant transformation can be used to further examine the methods listed.
4. The disease must kidney, hydronephrosis, renal multilocular cyst.
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